Blue
Ravenous Bugblatter Beast of Traal
I'm really surprised no one's mentioned my build, Swashbuckler / Dragon Sorcerer. I'm not particularly high level yet, but the combos are pretty incredible. Dragonic Resilience gives you decent AC for light armor. Booming Blade synergizes well with both Sneak Attack, Fancy Footwork and Panache. Plus Green Flame and Booming Blade cover the rogue's main weakness: AoE.
Unlike the wizard, your casting stat is important to your class as well, and unlike warlock or bard you get access to shield.
Draconic Resiliance gives +1 AC over studded leather, a nice bonus.
But I don't see how Booming Blade improves Sneak Attack or Fancy Footwork over normal attacks.
BB limits you to a single attack so a single miss removes all your sneak attack damage for the turn. And because it's not an Attack action it won't even trigger anything that could give you a second bonus-action attack like two-weapon fighting.
It synergies with Fancy Footwork exactly the same as any other attack, though if you had multiple attacks you could gain Fancy Footwork against multiple foes the same round.